Macbook air Trackpad, mouse jumping after waking up

Hi all,

Every other time i wake my macbook air from sleep and log in, the track pad becomes completely un-responive and the cursor on the screen starts slowly jumping around in about 2cm jumps, from down to up, left to right, its pretty random.

I find the only way to sort this out is closing the laptop again, waiting 10 seconds, opening it up again and then the mouse is all good.

I have the latest firmware update and the below are my specs:

Hardware Overview:

Model Name: MacBook Air

Model Identifier: MacBookAir4,2

Processor Name: Intel Core i5

Processor Speed: 1.7 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache (per Core): 256 KB

L3 Cache: 3 MB

Memory: 4 GB

Boot ROM Version: MBA41.0077.B0F

SMC Version (system): 1.73f63

Serial Number (system): C2QHCJH7DJWT

Hardware UUID: 63DB9B5A-517A-5292-B9C9-657C69786BA5